Electromagnetic speed-indicator for cream clarifiers and separators



H. J. YOUNG.

ELECTROMAGNETIC SPEED INDICATOR FOR CREAM CLARIFIERS AND SEPARATORS.

APPLICATION FILED 050.9, 1918.

'1 09,399, Patented July 8, 1919.

INVENTOR.

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HOMER J. YOUNG, F DAYTON, OHIO.

ELECTROMAGNETIC SPEED- INDICATOR FOR CREAM CLARIFIERS AND SEPARATORS.

Application filed. December 9, 1918.

To all whom it may concern:

Be it known that I, HOMER J. YOUNG, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Electro-Magnetic Speed-Indicators for Cream Clarifiers and Separators, of which the following is a specification.

The principal object of this invention is to provide for centrifugal clarifiers and separators, magnetic means which will be under the influence of the revolving bowl to simply and effectively indicate the speed of its rotation.

In order to secure the best results in the centrifugal clarifier and separator art, it is necessary that the speed of rotation of the elarifier or separator bowl be maintained at a predetermined point. A speed of rotation below that point does not insure a complete separation of the heavier portion of the milk, with a resultant loss in the yield of cream; while a speed of rotation above that point results in the breaking up of many globules of butter fat, attended byan inferior yield of cream for butter making.

The indicator which is the subject of the present invention, is applied to the clarifier or separator casing, for magnetic operation by the revolving bowl, to accurately indicate the speed of the latter at all times, whereby it may be instantly regulated to produce the best results.

The preferred form of embodiment of the invention is illustrated in the accompanying drawings, of which Figure 1 is a longitudinal section taken through a portion of aseparator bowl, casing and the magnetic indicating device. Fig. 2 is a sectional. view of the cup-shaped magnets, spring and indicating; arm. Fig. 3 is a front view of the indicating part of the magnetic device. Fig. 41 is a perspective view of the cylindrical container. And Fig. 5 is a perspective view of the cup-shaped magnets, sprin and indicating arm.

Throughout the specification and drawings, similar reference characters denote corresponding parts.

In a detailed description of the preferred form of embodiment of my invention, the numeral 1 designates a clarilier or separator casing within which a bowl 2 is revoluble.

At one side the casing 1 is provided with an outwardly bulging portion. preferably Specification of Letters Patent.

Patented July 8, 1919.

Serial No. 265,877.

L shaped in ross section, with an obliquely disposed opening in its top to receive a threaded, annular flanged holder 4. The latter supports at its middle portion a clear glass lens 5, through which may be read the graduations 6 on a dial plate 7 disposed below it. These graduations 6 are traversed by the outer end of a pointer 8 disposedfor a free radial movement between the lens 5 and dial plate 7, and fast on the outer end of a shaft 9 which extends into a cylindrical container 10 preferably constructed of copper and now to be described.

Referring to Figs. 1 and a, the container 10 comprises a cylinder closed at both ends, into whose hollow interior the shaft 9 extends through a bearing 11 provided in its top 12, and into a raised bearing 13 provided in its bottom 1%. An annular groove 15 is centrally provided in the container 10 to receive a band 16 preferably constructed of stiff spring metal. The band 16is spilt,and terminates at one end in an angular ear portion 17 adapted to be firmly secured to the lower side of the outwardly bulging portion 3 of the separator casing. Screws 18 18 are adapted to be passed through said casing side into engagement with the periphery of said container, whereupon, against the pressure of its supporting spring band 16, it may be moved toward the bowl 2 for the following purpose.

Referringto Figs. 1, 2 and 5, two cupshaped magnets 19 19 are oppositely mounted on the lower end of the shaft, so that the north poles of one will be directly opposite the south poles of the other. The magnets 19 19 are free to rotate within the copper container 10, under the influence of the eddy currents induced in the separator bowl 2 when the latter is revolved. By means of the screws 18 1S and spring 16, the container 10 may be moved toward or away from the bowl 2 to bring the magnets therein at a de sired distance from the latter. This distance is such that when the bowl 2 is rotated, the magnets 19 19 will be turned thereby to rotate the shaft 9 and the pointer 8, under the ever-increasing tension of a hair spring 20, one end of which is secured to the shaft 9. The outer end of said spring terminates in a threaded tubular piece 21 which receives a screw 22 adapted to be passed through a humped member 23 secured within the container 10, whereby the tension of said spring may be adjusted.

(See Figs. 1, 2 and The 'opper container is provided to produce a dampening effect on the magnetic flux, to assist the spring 20 in retarding the movement of the magnets 19 19 under the influence of the eddy currents induced in the revolving bowl 2, whereupon the pointer 8 will correctly indicate on the dial 6 the speed of rotation of said bowl. If the bowl is being rotated too fast, the counter drag produced thereby on the field will pull the magnets around, and through them the pointer, to a position which indicates a too rapid rotation of said bowl, and which may be slowed down by the operator after he has observed said reading on the dial. On the other hand, a revolution of the bowl 2 that is too slow for eflective results, will not exert suificient attraction upon the magnets 19 19 to turn them very far under the tension of the spring 20, whereupon the pointer 8 will indicate on the dial a speed which is below the normal one.

In order to strengthen the electrical pull on the magnets 19 19, the revoluble bowl 2 is shown in Fig. 2 as containinga rib 25 which projects into the space between said magnets, thereby cutting more of the lines of force passing between them.

Having described my invention, I claim:

1. In a device of the type specified, the combination with a revolublebowl, of mag netic means placed at a point in proximity to the outer periphery of said bowl where the latter, during operation, will cut the flux of said magnetic means, to exert a drag upon the said magnetic means, and a device operated by said magnetic means to inclicate the speed of rotation of said bowl.

2. In a device of the type specified, the combination with a. revoluble bowl, of a magnet placed in proximity to the outer periphery of said bowl at a point where the latter, during operation, will cut the flux of said magnet, which is movable, to exert a drag upon said magnet, and an indicator operated by said magnet to indicate the speed of rotation of said bowl.

3. In a device of the type specified, the combination with a revoluble bowl, of a r0- tatable magnet mounted in proximity to the outer periphery of said bowl at a point where the latter, during rotation, will cut the flux of said magnet, to exert a drag upon said magnet, and resilient means against whose tension said magnet is turned by the drag exerted by the revolving bowl, to indicate the speed of the latter.

4. In a device of the type specified, the combination with a revoluble bowl, of a ro tatable magnet mounted in proximity to the outer periphery of said bowl at a point where the latter, during rotation, will cut the flux of said magnet, to exert a drag upon said magnet, an indicator arm secured to the front end of said magnet, a dial traversed by the outer end of said arm, and a hair spring against whose tension said magnet is turned by the drag exerted by the revolving bowl, to bring said arm to a point on the dial indicating the speed of rotation of said bowl.

5. In a device of the type specified, the combination with a revoluble bowl, of a pair of rotatable magnets in proximity to the outer periphery of said bowl, an annular pro jection on said bowl entering the space between said magnets to cut the flux thereof for the purpose of exerting a drag on said magnets during the bowls rotation, and an indicator operated by said magnets to inclicate the speed of rotation of the bowl.

In testimony whereof I have hereunto set my hand this 6th day of December, 1918.

HOMER J. YOUNG.

Witness:

H. S. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G. 

